Xen and 9th generation

[Davis_Phillips at Dell.com]

The HWADDR line in the ifcfg-ethX files _should_ work. This is more a
working as designed. The 2.6 kernel will enumerate the devices in an
descending order vs. the 2.4 kernels ascending order. This is not an
issue on a non-9g system because the previous duel integrated NICs on
all older machines shared the same pci bus. The 9G servers have separate
PCI buses per each NIC, 5 and 9 I believe. I have experimented with
various options including pci=nosort, netdev, ethers (deprecated). None
of these particular options had an affect on the configuration. The
naming policy on the NICs is arbitrary in the sense that as the devices
are enumerated by the kernel the devices are named. I also went to far
as to email the maintainer of broadcom's bnx2 driver. Some older modules
(such as tulip) had the ability to flip the enumeration order.

Ifrename or Matt Domsch's script to rename the NICs is the best
solution. 

Hope that helps,
Davis

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Cameron Moore
Sent: Wednesday, July 26, 2006 3:49 PM
To: linux-poweredge-Lists
Subject: Xen and 9th generation

I have a new PE2950 that is having the same problems that others have
reported[1]: because of NIC ordering/discovery, networking in Xen
doesn't work.  What is the current situation with resolving this issue?
Anyone found a definite work-around yet[2]?  When will the new
motherboards be ready?  ;-p

[1] Other reports of Xen/NIC issues:
http://lists.us.dell.com/pipermail/linux-poweredge/2006-July/026316.html
http://lists.us.dell.com/pipermail/linux-poweredge/2006-July/026322.html
http://lists.us.dell.com/pipermail/linux-poweredge/2006-July/026553.html
http://lists.xensource.com/archives/html/xen-users/2006-07/msg00719.html

[2] I'm currently using FC5.  I've tried reconfiguring the bridge as
Dirk mentioned (see [1]), disabling the second on-board NIC, and forcing
HWADDR in ifcfg-eth[0-1] with no luck.  I can get the system where I can
ping my subnet if I have both NICs plugged in, but can't get beyond my
own subnet.  I can't get anything to work using a single NIC.
--
Cameron Moore
/ If toast always lands butter-side down, and cats always land on their
\ \ feet, what happen if you strap toast on the back of a cat and drop
it? /

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